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我的现实有问题。它不能读取目标ID（总是0x00）。环回测试没有问题，所以我检查了目标连接电路。我们有我们的标准目标连接与10kHMUP向上电阻从VPP/MCLR线到Vdd。无盖。认为这是首选价值。正如我记得4.7. 10K MCLR上拉电阻值推荐在较旧的ICDX手册。Bur现在我读的建议是大约50 KΩ为每个程序员和最小的真正的冰。发生什么事？这就是我的问题的原因吗？在其他目标上，这个10kClinux电路工作得很好。ICD3从程序员的MPLABX帮助中很好地工作：真正的ICEA上拉电阻（最小50KΩ）应该从VPP/MCLR线连接到Vdd，以便线路可以被选低电平来复位器件。ICD 3A上拉电阻（U）。推荐从VPP/MCLR线路连接到VDD的大约50 KΩ），使得线路可以被选通到低电平以复位器件。建议从VPP/MCLR线路连接到VDD的ICD 4A上拉电阻器（通常大约50 KΩ），以便线路可以低选通以复位器件。PicKitThe图还示出从连接器到目标PCB上的设备的布线。一个上拉电阻（通常在10 KΩ）被推荐从VPP/MCLR线连接到Vdd，以便该线可以被选低以重置该器件。但是该图片显示了50KOHM（远离通常为10 KΩ）的电阻，就像所有其他程序员一样。
以上来自于百度翻译 以下为原文 I got problems with my RealICE. It can not read the target ID (always 0x00). The loop back test runs without problems So I checked the target connection circuitry. We have our standard target connection with 10kOhm pull-up resistor from the Vpp/MCLR line to Vdd. No caps. Thought this is the preferred value. As I remember 4.7..10k MCLR pullup resistor values were recommended in older ICDx manual. Bur now I read the recommendation is around 50 kΩ for every programmer and as a minimum for the Real Ice. What happens? Could this the reason for my problem? On other targets this 10k connection circuitry works fine. ICD3 works fine on that target From MPLABX help for the programmers: Real ICE A pull-up resistor (minimum 50kΩ) should be connected from the Vpp/MCLR line to Vdd so that the line may be strobed low to reset the device. ICD 3 A pull-up resistor (usually around 50 kΩ) connected from the Vpp/MCLR line to the Vdd is recommended so that the line may be strobed low to reset the device. ICD 4 A pull-up resistor (usually around 50 kΩ) connected from the Vpp/MCLR line to the Vdd is recommended so that the line may be strobed low to reset the device. PicKit The diagram also shows the wiring from the connector to a device on the target PCB. A pull-up resistor (usually around 10 kΩ) is recommended to be connected from the Vpp/MCLR line to Vdd so that the line may be strobed low to reset the device. But the picture shows a 50kOhm (far away from "usually around 10 kΩ") resistor as on all other programmers
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8个回答
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什么设备？什么是MPLAX版本？通常，当您获得0x00的Debug ID时，PGC/PGD存在问题，您在这些行上有任何组件吗？？
以上来自于百度翻译 以下为原文 What device? What MPLAB X version? typically when you get a deviceID of 0x00 there is issues with PGC/PGD, do you have any components on those lines?? |
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10K将受到电缆长度和VCC长度的影响。
以上来自于百度翻译 以下为原文 The 10K will be affected by , the length of the cable and Vcc. |
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让程序员重新工作，在重置为默认值之后。MPLAB X为4.05，它是PIC24FJ256DA210，但仍然让我困惑的是上拉的推荐值（min.50K）。但是50K离我们很遥远，我们应该在我们的董事会上更改到50K，以确保我们能和所有程序员一起编程所有的部分吗？Microchip意识到他们的输出驱动器只能从他们先前的估计中驱动1/5的电流吗？我们的服务在全世界不断更新。他们讨厌擦除作品，但编程却不喜欢；
以上来自于百度翻译 以下为原文 Got the programmer working again, after reset to default values. MPLAB X is 4.05 and it is a PIC24FJ256DA210 But the point that's still confusing me is the recommended value of the pull-up (min. 50k) . With original cable length, of cause. Thought our 10k value was fine. But 50k is far away. Should we change to 50k on our boards to be sure that we can program all parts with all programmers? Have microchip realized that their output-driver can only drive 1/5 of the current from their previous estimations? Our service makes updates in the whole world. And they hate it when erasing works, but programming does not ;-) |
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嗨，我已经设计和建造了许多板（产品）多年来，与10K拉出，使用编程和调试实境。我从来没有把这个问题归因于这个电阻器的价值，所以我的建议是…不要惊慌…
以上来自于百度翻译 以下为原文 Hi, I have designed and built numerous boards (products) for many years, with a 10K pullup, using a REALICE for programming and debugging. I have never had an issue attributed to the value of this resistor. Therefore my advice is....dont panic.... |
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我在很多不同的项目和程序员中使用了一些不同的价值观。最常见的是12K1，因为我需要其他东西的那个值。从来没有真正的问题
以上来自于百度翻译 以下为原文 I have used a few different values on lots of different projects and programmers. The most common being 12k1 because I need that value for something else. Never really had an issue |
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50K的原因是一些部件有能力通过VPP首先进入编程模式。这是您可以将MCLR作为输入的部分。但用10K电阻，然后施加12V到VPP，然后通过10K VDD被拉起来，部分不能完全复位（通过驱动VDD到GND），所以50K允许那些部件正确工作。因此，50K成为默认值。对于大多数应用程序，10K将不会成为一个问题。
以上来自于百度翻译 以下为原文 The reason for the 50k is that some parts have the capability of getting into programming mode via Vpp first. This is on parts where you can have MCLR as an input. But with a 10k resistor, and applying 12v to Vpp then through the 10k Vdd gets pulled up and the part cannot be fully reset (by driving Vdd to gnd) so the 50k allows those parts to work correctly. So 50k then became the default. For most applications 10k will not be an issue. |
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这是对我的支持票的“官方”回答“推荐更改到MCL上50K的原因是什么？”“这儿，可怜的傻瓜！带着我所有的知识我站起来！“没有比以前更明智”，因为这不是我的问题的答案。但是仍然有趣：Microchip本身似乎不确定他们想推荐什么：一个MC设计中的新手将使用官方公布的50K推荐。
以上来自于百度翻译 以下为原文 This is the "official" answer to my support ticket "What is the reason for recommendation change to 50k pull-up on MCLR?": "And here, poor fool! with all my lore. I stand! no wiser than before" Because this is not the answer to my question. But still interesting: Microchip itself does not seem to be sure what they want to recommend wink: A newbie in MC design will of cause use the official publicized recommendation of 50k! |
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@ DEVMOD1谢谢解释。你能更具体地说“部分”是什么吗？我在PIC24设备上有问题（错误ID），ICD3设备在那里工作。顺便说一句，在使用完整版本时，我总是有一个“访问餐”错误。我必须复制和过去的文本进入快速回复窗口后格式化的完整版本。烦人的
以上来自于百度翻译 以下为原文 @DevMod1 Thanks for the explanation. Can you be more specific what "some parts" are. I got problems (wrong ID) with RealIce on PIC24 devices where ICD3 did the job. Btw: I always got an "access dined" error when using the full version. I have to copy and past in the text into the quick reply window after formatting in full version. Annoying |
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